<template>
	<view>
		<view class="search-box">
			<!-- 使用 uni-ui 提供的搜索组件 -->
			<uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>

			<view class="sugg-list" v-if="searchResults.length !== 0">
				<view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
					<view class="goods-name">{{item.goods_name}}</view>
					<uni-icons type="arrowright" size="16"></uni-icons>
				</view>
			</view>

			<!-- 搜索历史 -->
			<view class="history-box" v-else>
				<!-- 标题区域 -->
				<view class="history-title">
					<text>搜索历史</text>
					<uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
				</view>
				<!-- 列表区域 -->
				<view class="history-list">
					<uni-tag @click="gotoGoodsList(item)" :text="item" v-for="(item, i) in histories" :key="i">
					</uni-tag>
				</view>
			</view>
		</view>


	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
				searchResults: [],
				historyList: ['小米', '华为', 'apple']
			};
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		computed: {
			histories() {
				return this.historyList.reverse()
			}
		},
		methods: {
			gotoGoodsList(kw) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?query=' + kw
				})
			},
			cleanHistory() {
				// 清空 data 中保存的搜索历史
				this.historyList = []
				// 清空本地存储中记录的搜索历史
				uni.setStorageSync('kw', '[]')
			},
			input(e) {
				clearTimeout(this.timer)
				this.time = setTimeout(() => {
					this.kw = e.value
					this.getSearchList()
					console.log(this.kw)
				}, 500)
				// e.value 是最新的搜索内容

			},
			gotoDetail(goods_id) {
				uni.navigateTo({
					// 指定详情页面的 URL 地址，并传递 goods_id 参数
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
				})
			},
			async getSearchList() {
				if (this.kw === '') {
					this.searchResults = []
					return
				}
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/qsearch', {
					query: this.kw
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
				this.saveSearchHistory()
			},
			saveSearchHistory() {
				// 2.1 直接把搜索关键词 push 到 historyList 数组中
				// 1. 将 Array 数组转化为 Set 对象
				const set = new Set(this.historyList)
				// 2. 调用 Set 对象的 delete 方法，移除对应的元素
				set.delete(this.kw)
				// 3. 调用 Set 对象的 add 方法，向 Set 中添加元素
				set.add(this.kw)
				// 4. 将 Set 对象转化为 Array 数组
				this.historyList = Array.from(set)

			}

		}
	}
</script>

<style lang="scss">
	.uni-searchbar {
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		position: relative;
		padding: 16rpx;
		/* 将默认的 #FFFFFF 改为 #C00000 */
		background-color: #c00000;
	}

	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
	}

	.sugg-list {
		padding: 0 5px;

		.sugg-item {
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			display: flex;
			align-items: center;
			justify-content: space-between;

			.goods-name {
				// 文字不允许换行（单行文本）
				white-space: nowrap;
				// 溢出部分隐藏
				overflow: hidden;
				// 文本溢出后，使用 ... 代替
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}

	.history-box {
		padding: 0 5px;

		.history-title {
			display: flex;
			justify-content: space-between;
			align-items: center;
			height: 40px;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}

		.history-list {
			display: flex;
			flex-wrap: wrap;

			.uni-tag {
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
</style>
